Debian DSA-3653-1 : flex - security update

critical Nessus Plugin ID 93116

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Synopsis

The remote Debian host is missing a security-related update.

Description

Alexander Sulfrian discovered a buffer overflow in the yy_get_next_buffer() function generated by Flex, which may result in denial of service and potentially the execution of code if operating on data from untrusted sources.

Affected applications need to be rebuild. bogofilter will be rebuild against the updated flex in a followup update. Further affected applications should be reported at the bug referenced above.

Solution

Upgrade the flex packages.

For the stable distribution (jessie), this problem has been fixed in version 2.5.39-8+deb8u1.

Plugin Details

Severity: Critical

ID: 93116

File Name: debian_DSA-3653.nasl

Version: 2.10

Type: local

Agent: unix

Family: Debian Local Security Checks

Published: 8/26/2016

Updated: 1/11/2021

Supported Sensors: Agentless Assessment, Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:debian:debian_linux:flex, cpe:/o:debian:debian_linux:8.0

Required KB Items: Host/local_checks_enabled, Host/Debian/release, Host/Debian/dpkg-l

Exploit Ease: No known exploits are available

Patch Publication Date: 8/25/2016

Reference Information

CVE: CVE-2016-6354

DSA: 3653

Detections

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